在贸易支付中,信用证与票据既可以相互独立,完成各自的支付使命,也可以相互结合,互相补充,增强支付的功能。《UCP500》规定的四种信用证中,除了延期付款信用证之外,其他三种都是可能或应当使用汇票。信用证下的汇票由受益人开具,相对于受益人所应提交的其他单据而言,对基础合同 In trade payments, letters of credit and bills can be independent of each other to complete their respective payment mission, but also can be combined with each other, complement each other, enhance the payment function. Among the four letters of credit stipulated in “UCP500”, all three except the deferred payment letter of credit may or should use a draft. The draft under the letter of credit issued by the beneficiary, relative to the beneficiary should submit other documents, the basic contract